Most homeowners we meet have already been told they need a new roof. A storm rolled through, a contractor knocked on the door, and the conversation jumped straight to a full replacement before anyone actually walked the roof with a measuring wheel and a moisture meter. That is a sales pitch, not an inspection.
A residential roof in West Michigan can have years of life left in it and still need real work. It can also look fine from the curb and be one storm away from a ceiling leak. The right answer depends on five things — none of which is the age on the paperwork — and a homeowner who knows what to look for is harder to push into a job they do not need.
When a Repair Is Almost Always Enough
A targeted repair beats a tear-off when the damage is local and the deck underneath is dry. These are the six situations where a good repair crew will get you back to a sound roof for a small fraction of replacement cost.
A Few Missing or Lifted Shingles After a Wind Event
Straight-line wind pulls shingles up at the corners and occasionally strips a row off a slope. If the rest of the roof's seal strips are intact and the deck is dry, this is a same-day repair with matching shingles and fresh sealant. Replacing a 22-square roof because of one stripped row is exactly the kind of upsell the door-knock crews push.
An Isolated Leak Around a Vent or Pipe Boot
The rubber boot around plumbing vents dries out and cracks long before the rest of the roof does — usually around year 10. The fix is a new boot, fresh flashing, and a tube of roofing-grade sealant. Total job: an hour. We see this leak misdiagnosed as a failing roof at least once a month.
Flashing Failure at a Chimney, Wall, or Skylight
Most residential leaks are not roof leaks — they are flashing leaks. The metal where the roof meets a wall, a chimney, or a skylight pulls away from the substrate as the building moves. The fix is to re-flash the detail and tie it back into the shingle field, not to tear off the whole roof.
Single-Slope Hail Damage Under Insurance
Hail often clobbers one slope and leaves the others alone. If the carrier pays to match shingles across only that slope — and the rest of the field is sound — a slope repair is fully inside policy. If matching cannot be achieved, the carrier often owes the full roof. Either outcome is normal. Letting a contractor walk the roof with the adjuster decides which one you get.
Ice-Dam Damage at the Eave
West Michigan winters back water up under shingles when ice builds at the eave. The first repair is the underlayment along the eave — adding ice-and-water shield up six feet from the gutter line and re-shingling that band. If it gets caught in the first season, the deck above almost never has to come up.
Granule Loss in One Section, Not Across the Field
Granules wear off where water concentrates — usually a drip-line under a higher slope, the run below a valley, or a spot under a tree that drops debris. Concentrated granule loss in one section is a repair. Granule loss spread evenly across the whole roof is something else, and shows up in the replacement list below.
When Replacement Is Actually the Right Call
Some roofs are past the point where repairs make sense. Money sunk into a patch on a roof that needs to come off is money you do not get back. These are the five conditions that move a residential roof from the repair list to the replacement list.
Decking That Is Rotted, Sagging, or Soft
If the plywood or OSB underneath the shingles is wet, soft to walk on, or sagging between rafters, the deck has lost structural capacity. New shingles over a bad deck do not last — the fasteners do not hold and the new field telegraphs every soft spot. A tear-off lets us replace the bad sheets, inspect every rafter, and start the new system on a sound substrate.
Granule Loss Across the Entire Roof Field
When granule loss is spread evenly across the whole roof — gutter buckets full of granules every spring, bald patches on more than one slope — the asphalt is exposed to UV across the whole field and the shingles are aging out together. A repair on one section does not extend the life of the others; the rest catch up within a season or two.
Curling, Cupping, or Clawing Shingles Across Multiple Slopes
Shingles that have lifted at the corners, cupped in the middle, or pulled away from the deck are at the end of their service life. The seal strip has failed. The next wind event will lift them no matter how good the repair underneath is. Multiple slopes showing the same pattern means the roof has aged out across the board.
Existing Layered Roof (Already Two Layers)
Michigan code allows up to two layers of roofing on a residential home. If you already have two — common on homes where a prior owner did a layover instead of a tear-off — the next roof has to be a full tear-off back to the deck. That is also when we usually find decking issues that were hidden under the layered shingles for the last decade.
Wide-Area Hail Damage Across Multiple Slopes
When hail bruises every slope — round dents in the shingle mat, granule fields knocked off in dime-to-quarter circles, soft spots when you press a thumb against the impact — the whole roof is compromised. Carriers almost always pay for a full replacement on a roof like this because matching cannot be achieved across that much damage. Repairing one slope on a roof the insurance will replace at no cost is the wrong trade.
The Grey Zone — and How to Tell Which Side You Are On
Plenty of roofs sit between the two lists above. The shingles look tired but not dead. There is one section that worries you and three that look fine. There has been a storm, but no obvious damage. This is where the decision actually gets made — and it is also where most homeowners get talked into the wrong job. Three checks settle it.
- ◆An infrared moisture map. Wet underlayment and saturated decking do not show from the outside. A handheld infrared scan shows exactly where water has gotten under the shingles and how far it has traveled. That map tells you whether the field is wet across the whole roof — a replacement signal — or dry except for one corner — a repair. We run this scan free on every residential inspection in West Michigan.
- ◆A deck check from the attic. Half an hour with a flashlight in the attic catches problems the roof itself cannot show you — daylight at the soffits, staining on the rafters, soft spots in the sheathing, exhaust-fan ducts dumping moisture into the deck instead of outside. Some of those are roof problems and some of those are ventilation problems, and they get fixed differently.
- ◆A storm-history check. If there has been a hail or wind event in the last two years, the damage may be covered under your homeowners policy regardless of which side of the line your roof is on. We pull the storm history for your address, document any damage on the inspection report, and walk the roof with your adjuster if you choose to file. That single step is often the difference between a $9,000 repair and a fully covered replacement.
Why Replacement Gets Pushed More Than It Should
A repair job is a one-day, one-truck visit with thin margins. A full replacement is a four-day job that books out a crew, a dumpster, a delivery, and a much larger ticket. There is a structural reason replacement gets pushed harder than the roof's actual condition warrants: it is the bigger sale. That does not make every replacement quote wrong — most replacement recommendations are honest. But it does mean a homeowner who cannot tell the difference between a tired roof and a dead one is going to be steered toward the more profitable answer more often than the data supports.
The fix is not skepticism for its own sake. It is a second opinion that includes a moisture map and a real attic check — from a contractor who handles both repair and replacement and does not have a reason to push you to one over the other.
How We Run the Decision at Platinum
A residential inspection with Platinum Roofing Restoration is free and runs about an hour. We walk every slope, photograph anything we flag, scan the field with infrared moisture equipment, check the attic, and pull the storm history for the address. You get a written report — repair list, replacement scope if it is warranted, photos, and the moisture map — and a clear recommendation either way. If there is an open insurance claim, we meet the adjuster on site for free as well. We do both repairs and replacements, so the recommendation comes from what the roof actually shows, not from which job pays more.
Get a Free Roof Inspection With Moisture Mapping
GAF Certified · Family-owned in West Michigan since 1990 · We handle storm-damage insurance claims end-to-end and meet your adjuster on site at no cost.
Request Your Free InspectionFrequently Asked Questions
How old does a roof have to be before it has to be replaced?
Age alone is not the trigger — condition is. A standard asphalt-shingle roof is rated for 20 to 30 years, and most fail somewhere in that window. But a 15-year-old roof in a tree-shaded yard with poor ventilation can be in worse shape than a 22-year-old roof on a sunny lot that has been kept clean. The number we care about is not the age — it is whether the deck and the underlayment are still sound. A free inspection with moisture mapping tells you that in about an hour.
How much of a roof can you actually repair before you have to replace it?
The honest rule of thumb is about 30 percent. If less than roughly 30 percent of the roof field is damaged and the deck underneath is dry, a targeted repair almost always wins on cost, time, and warranty. Above 30 percent, the math starts to tip toward full replacement because the repair work begins to approach the cost of a new roof anyway. Hail-damage claims tend to push the number higher because insurance carriers usually pay for matching across the whole slope.
My insurance adjuster said I need a full replacement. Do I have to take their word for it?
No. An adjuster gives an estimate based on a roof walk and the carrier's pricing schedule — they are not roofers. You have the right to have a licensed roofing contractor inspect the same damage and supplement the claim if the adjuster missed shingles, flashing, decking, or matching that they are obligated to pay for. Most underpaid claims we see were not denied on purpose — the adjuster simply did not measure what a second set of eyes catches. We meet adjusters on site for every storm-claim inspection.
Can a new roof be installed over an old one, or does the old roof have to come off?
Michigan code allows up to two layers of roofing on a residential home, so technically a second layer can go over an old one. We almost never recommend it. A layover hides any rot in the decking, traps heat that shortens the new roof's life, and adds dead-load to the structure. It also voids most shingle manufacturer warranties. The marginal savings on the install — usually a few hundred dollars on a normal home — are not worth giving up a full warranty and a clean look at the deck.
If I have a storm-damage claim, does it matter whether I pick repair or replacement?
Yes — and you usually do not have to pick. When hail or wind damage triggers a covered claim, the insurance carrier owes you the cost to restore the roof to its pre-loss condition, including matching shingles across the slope or the full roof if a match is not available. That often results in a full replacement being covered when only one slope was hit. The right move is to let a contractor who handles storm claims walk the roof with the adjuster and document what is actually owed under the policy. We do that at no cost.